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Multi-beam high-resolution detecting method for underwater sunk and buried target

A high-resolution, multi-beam technology, applied in the direction of sound wave reradiation, radio wave measurement system, measurement device, etc., can solve the problems of high requirements of synthetic aperture sonar detection platform, achieve good engineering application prospects, and improve angular resolution , the effect of small amount of calculation

Active Publication Date: 2019-07-02
750 TEST SITE OF CHINA SHIPBUILDING IND CORP
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Problems solved by technology

[0005] The embodiment of the present invention provides a multi-beam high-resolution detection method for underwater buried targets. High requirements, and it is necessary to detect the problem that the platform moves along a straight line with a uniform velocity in space

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  • Multi-beam high-resolution detecting method for underwater sunk and buried target
  • Multi-beam high-resolution detecting method for underwater sunk and buried target
  • Multi-beam high-resolution detecting method for underwater sunk and buried target

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Embodiment Construction

[0014] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0015] Refer to attached figure 1 , the embodiment of the present invention provides a method for multi-beam high-resolution detection of underwater buried targets, which specifically includes the following steps:

[0016] Step 1: Perform band-pass filtering on the echo data received by each hydrophone array element, then mix and up-sample, and perform spatial under-sampling DOA estimation on the obtained data within a certain angle range to obtain tim...

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Abstract

The invention provides a multi-beam high-resolution detecting method for an underwater sunk and buried target. The method comprises the following steps: step one, carrying out band-pass filtering on echo data received by each hydrophone array element, carrying out mixing up sampling, carrying out spatial undersampling DOA estimation on the obtained data within a certain angular range to obtain time domain signals of different beam domains; step two, carrying out mixing up sampling on a transmitting signal and using the processed signal as a reference signal, carrying out segmented matching andfiltering on the reference signal and an obtained beam domain signal to obtain amplitude values of different resolution units, and forming a detection acoustic map; and step three, carrying out detection acoustic map correction to obtain a final detection result. According to the invention, with the signal processing methods of mixing up sampling, spatial undersampling DOA estimation and the like, a sunk or buried target can be detected with high resolution in a large range; and the constant-speed linear movement of the detection platform in space is avoided.

Description

technical field [0001] The invention relates to the technical field of underwater buried target detection, in particular to a multi-beam high-resolution detection method for underwater buried targets. Background technique [0002] The detection of underwater buried targets has always been the focus and difficulty in the field of underwater acoustic detection. The existing detection technologies for underwater buried targets are usually parametric array detection technology and synthetic aperture sonar principle detection technology. [0003] Parametric array detection technology can only detect targets with a single beam, with a small detection range and low detection efficiency; synthetic aperture sonar has a wide range of high-resolution imaging capabilities and detection capabilities for sunken bottom, half-buried and buried targets, but the synthetic aperture Sonar requires the detection platform to move in a straight line at a constant speed in space. [0004] When the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/02
CPCG01S15/02Y02A90/30
Inventor 岳雷丁明惠
Owner 750 TEST SITE OF CHINA SHIPBUILDING IND CORP
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